Oldham BM25 User Manual

Also see for BM25: Operating manual

Contents

Oldham BM25 User Manual Manual pdf 42 page image

42 BM 25/25WInstruction ManualSelf-healingNOTE : This section covers the ‘BM 25’ mode only.Each BM 25W broadcasts a message every 10 seconds. Using the example shownbelow, if BM 25W tag A receives no message from BM 25W tag B for more than 2minutes, then B is considered as missing by A which turns into fault mode (case No. 2– Table of alarms) and transfers the information to all other BM 25Ws on the network.Note that BM 25W tag B can act the same if it receives no information from A. Numberof BM 25Ws that do not communicate anymore is displayed on each BM 25W referringa communication fault. This number may differ depending on the BM 25W you arelooking. Here below, one BM 25W out of four is no longer communicating.Figure 28 : One BM 25W out of four does not communicateIn case of communication failure, the network tries to reestablish communication everyten seconds.In BM 25 mode, if a BM 25W does not respond or if the network is split, then it ispossible to ignore this fault and to continue to work by the time of the restoration of thenetwork.